PROCESS FOR WATER TREATMENT PRIOR TO REVERSE OSMOSIS
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 12, 2014
filing date -
Mar 14, 2013
priority date (Note) -
Abandoned
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Abstract
A process for treating feedwater with a microfiltration or ultrafiltration membrane unit and a downstream reverse osmosis unit. An aluminum salt coagulant is added to the feedwater upstream of a membrane separation unit. The aluminum salt coagulant is mixed upstream of the membrane separation unit. A sufficient amount of the aluminum salt coagulant is mixed with the feedwater for a sufficient residence time to control the concentration of the aluminum in the permeate emitted by the membrane separation unit.
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